<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 19:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="15.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.17 (290) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202629010171950009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.718" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.477" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.107" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="359.986" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="271.066" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.472" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="124.959" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.753" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.223" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 315.000 315.625 316.250 316.875 317.500 318.125 318.750 319.375 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 326.250 327.500 328.750 330.000 331.410 332.821 334.231 335.641 337.051 338.462 339.872 341.282 342.692 344.103 345.513 346.923 348.333 349.744 351.154 352.564 353.974 355.385 356.795 358.205 359.615 361.026 362.436 363.846 365.256 366.667 368.077 369.487 370.897 372.308 373.718 375.128 376.538 377.949 379.359 380.769 382.179 383.590 385.000 386.410 387.821 389.231 390.641 392.051 393.462 394.872 396.282 397.692 399.103 400.513 401.923 403.333 404.744 406.154 407.564 408.974 410.385 411.795 413.205 414.615 416.026 417.436 418.846 420.256 421.667 423.077 424.487 425.897 427.308 428.718 430.128 431.538 432.949 434.359 435.769 437.179 438.590 440.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 480.000 485.000 494.306 505.274 518.393 534.365 554.234 579.622 613.204 659.706
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
84 72 0 0 0 0 0 0 51 78 75 78 78 75 78 81 78 75 72 0 0 0 0 81 0 0 78 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 60 60 57 57 57 60 60 63 66 66 69 0 0 0 54 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -1.171875 2.734375 1.171875 -0.390625 1.953125 1.171875 -1.171875 -1.171875 -1.171875 0.390625 1.953125 -0.390625 2.734375 -2.734375 -2.734375 -1.953125 1.171875 2.734375 -2.734375 1.953125 1.953125 0.390625 2.734375 -0.390625 -2.734375 0.390625 1.171875 0.390625 -1.171875 -0.390625 0.390625 -1.953125 -0.390625 0.390625 0.390625 -1.953125 2.734375 0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.731 90.0 95.0 100.0 105.0 110.0 115.0 117.624 120.0 125.0 125.248 130.0 132.872 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.986 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.413 1.825 2.039 2.107 2.052 1.977 1.977 1.977 1.977 2.058 2.107 2.176 2.347 2.529 2.72 2.918 3.121 3.33 3.542 3.758 3.977 4.199 4.424 4.652 4.882 5.115 5.351 5.59 5.831 6.075 6.323 6.573 6.825 7.081 7.339 7.599 7.862 8.127 8.393 8.66 8.928 9.195 9.461 9.725 9.985 10.24 10.488 10.726 10.952 11.163 11.356 11.528 11.674 11.792 11.879 11.932 11.95 11.95 11.943 11.924 11.893 11.85 11.797 11.733 11.66 11.579 11.489 11.391 11.287 11.176 11.059 10.937 10.809 10.678 10.543 10.404 10.262 10.117 9.97 9.821 9.671 9.519 9.367 9.213 9.059 8.905 8.751 8.597 8.444 8.291 8.139 7.988 7.838 7.689 7.542 7.395 7.251 7.108 6.966 6.826 6.688 6.552 6.418 6.286 6.155 6.027 5.9 5.776 5.654 5.533 5.415 5.299 5.184 5.072 4.962 4.854 4.748 4.644 4.542 4.442 4.343 4.247 4.153 4.06 3.97 3.881 3.794 3.709 3.625 3.544 3.464 3.385 3.309 3.234 3.16 3.089 3.018 2.95 2.882 2.816 2.752 2.689 2.628 2.567 2.509 2.451 2.395 2.34 2.286 2.233 2.182 2.132 2.082 2.034 1.987 1.942 1.897 1.853 1.81 1.768 1.727 1.687 1.648 1.61 1.573 1.536 1.501 1.466 1.432 1.399 1.366 1.335 1.304 1.273 1.244 1.215 1.187 1.159 1.132 1.106 1.08 1.055 1.03 1.006 0.983 0.96

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.107" PeakHeight="110.0" Num="3" Error="0.0">
-29.225 11.33 -2.374
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.107" EndFrequency="11.95" PeakHeight="359.986" Num="5" zHalfNm="271.066" Error="2.336">
-210.099 -26.668 11.801 -1.924 -0.224
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.872" Depth="0.13"/>
<TopsideChapman PeakHeight="359.986" PeakDensity="1771743.1" PeakScaleHeight="66.223" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
